Unreal Tournament 4 - obects not glowing bug

Hi graphics of pre-Alpha UT (4) is looking really strange.
Most of the maps are OK but some objects which should produce light (glowing) i.e. link gun beam or vital health just don’t do that. I was searching on forums and couldn’t find anyone reporting this however some youtube game-play videos does have the same bug.

I’m attaching few screenshots where bug appears and 2 screenshots from youtube in for comparison.
Buggy lightning objects at the screenshots:
screen1 - Vital health green stripe and yellow lights are not really glowing
screen2 - U Damage is not really glowing
screen3 - Link Gun beam is not really glowing
screen4 - Bio rigle material is dark
screen5 - shock rifle - sphere is dark
Screen shots could be find here:
https://www.epicgames.com/unrealtournament/forums/showthread.php?26010-UT4-lightning-bug-some-objects-are-not-glowing

For comaprison:
youtube-comparation-screen1 - vital health
youtube-comparation-screen3 - link gun bean

I’m having fully updated Windows 7 Ultimate x64, newest graphics drivers, most recent DirectX11 (according to MS web installer)

Any advice will be much appreciated.

PS: I really don’t want to migrate to Windows 10 (for DX12) due to MS spying…

My specifications:

Operating System: Windows 7 Ultimate 64-bit Service Pack 1
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: EP45-DS3R
BIOS: Award Modular BIOS v6.00PG
Processor: Intel(R) Core™2 Quad CPU Q9650 @ 3.00GHz (4 CPUs), ~3.0GHz
Memory: 8192MB RAM
Available OS Memory: 8190MB RAM
Page File: 4013MB used, 12365MB available
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: 96 DPI (100 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode


Display Devices

Card name: NVIDIA GeForce GTX 1050
Manufacturer: NVIDIA
Chip type: GeForce GTX 1050
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_1C81&SUBSYS_372D1458&REV_A1
Display Memory: 1710 MB
Dedicated Memory: 1967 MB
Shared Memory: 3839 MB
Current Mode: 3840 x 2160 (32 bit) (60Hz)
Monitor Name: SAMSUNG (SAM0C01 EDID Override)
Monitor Model: unknown
Monitor Id:
Native Mode: unknown
Output Type: Unknown
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 21.21.0013.7633 (English)
Driver Version: 21.21.13.7633
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 12/12/2016 03:37:18, 17436808 bytes
WHQL Logo’d: n/a
WHQL Date Stamp: n/a
Device Identifier: {D7B71E3E-5FC1-11CF-396A-20171BC2D835}
Vendor ID: 0x10DE
Device ID: 0x1C81
SubSys ID: 0x372D1458
Revision ID: 0x00A1
Driver Strong Name: oem51.inf:NVIDIA_Devices.NTamd64.6.1:Section024:21.21.13.7633ci\ven_10de&dev_1c81
Rank Of Driver: 00E62001

Here you can find wole bug report including pictures:

https://www.epicgames.com/unrealtournament/forums/showthread.php?26010-UT4-lightning-bug-some-objects-are-not-glowing